package com.changgou.order.service;

import com.changgou.order.pojo.Order;
import com.changgou.order.pojo.OrderItem;

import java.util.List;

public interface CartService {
    //添加购物车
    void add(Integer num , Long id,String username);
    //展现购物车的内容
    List<OrderItem> list(String username);
}
